Neutron production from thin and thick targets by high-energy heavy ion bombardment

We measured neutrons produced from thin and thick targets bombarded by high-energy heavy-ions. The angular and energy distributions of neutrons produced by 100 and 180 MeV/nucleon He, 100, 180, 400 MeV/nucleon C, 100, 180, 400 MeV/nucleon Ne, 400 MeV/nucleon Ar, Fe and Xe, and 800 MeV/nucleon Si ions stopping in thick carbon, aluminium, copper and lead targets were measured using the Heavy-ion Medical Accelerator in Chiba (HIMAC) of the National Institute of Radiological Sciences (NIRS), Japan. The experimental results are compared with calculations using the HIC code, and the calculated results agree with the measured results within a factor of 2. The double differential cross-sections (DDX) of neutron production from thin C, Al, Cu and Pb targets bombarded by 135 MeV/nucleon C ion were measured using the RIKEN ring cyclotron of the Institute of Physical and Chemical Research, Japan. The experimental spectra were compared with the calculations using the HIC and the QMD codes.